Summary
IMAGINE there are rats running about in a hospital ward. But these rats are invisible and silent, do not leave droppings and do not nibble at leftover food.
In fact, they are undetectable by normal human senses, so they are actually very difficult to imagine.See the full content of this document
Extract
How to Beat the Hospital Nasties
Compare these rats with the visible, smelly, scratching, faeces- dropping variety, which would be darting up locker...
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